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Q.

A light ray is incident at angle of incidence i on a prism and deviated at an angle δ.The i versus δ graph is plotted, it is found as shown below. The value of refractive index of the prism material is

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a

1.5

b

2

c

3

d

53

answer is C.

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Detailed Solution

δm=60∘;i=60∘;r=A2∵ 60=2×60−A⇒A=60∘⇒r=30∘μ=sin⁡60∘sin⁡30∘=32×21=3

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